Interesting. But it seems as if there's only one official iOS app available. If we're using an open format like text files, wouldn't it be useful to be able to

Interesting. But it seems as if there's only one official iOS app available. If we're using an open format like text files, wouldn't it be useful to be able to change apps/clients easily? Similar to a feed reader - I use Feedbin as the backend to collect and manage my feeds. However as a client I often switch between Reeder, Unread or Mr. Reader. I'd like to see something like Feedbin for Todos/GTD - how portable is the data if the official apps seem to be the only ones using the Todotxt data?